Rotary valve for pipe lines



Aug-26 1924.

4 A. ,GAGG

ROTARY VALVE FOR PIPE LINES Filed Nov. 26. 1923 Patented Aug. 2%, 1924.

UNITED STATES passes eerie.

ANTON GAGG, OF ZURICH, SWITZERLAND, 51581611303 T0 FIRM: AKTIENGESELL- SCHAFT DER. MASCHINENFABRIKEE ESCI-IEE *WYSS t CIR, OF ZURICH, SWITZER- LAND.

ROTARY VALVE FOR PIPE LIVES.

Application filedv 1"; evember 26, 1923.

To all whom it may concern:

Be it known that l, ANTON GAGG, a citi- Zen of the Republic of Switzerland, residing at Zurich, Switzerland, have invented certain new and useful Improvements in Rotary Valves for Pipe Lines, of which the following is a specification, reference being had therein to the accompanying drawing.

The present invention relates to improvements in rotary valves for pipe lines described and claimed in the application of Huguenin and Gagg Ser. No. 621386 filed Febr. 26, 1923. The object of the present invention is to facilitate the movement of the rotary gate body after the movable closing or packing disc has been relieved of the pressure present in the pipe line. To this end according to the present invention the outer surface of the movable closing disc is provided with a part arranged in such a manner that the pressure present inside the valve casing acts on the closing disc in 0pposition to the pressure present in the hollow space arranged in front of the closing disc. The outer surface of the movable closing disc is preferably provided with a ledge or shoulder exposed to the pressure present inside the valve casing.

A constructional example of the subject matter of the present invention is illustrated on the accompanying drawing, in which:

Fig. 1 is a section along the axis of rotation through the closed valve, and

Fig. 2 shows on a larger scale a detail of Fig. 1.

In the drawing 1 denotes again the spherical valve casing in which the rotary gate body fis rotatably mounted by the fulcrum pins 2 and 3. On the extension of pin 3 a gear 5 is fixed by means of which rotation is imparted to the gate body 4;. The latter is, in the same manner as in the original patent, provided with a lateral extension (5 having a short cylindrical flange 7 in which the closing or packing disc 8 is movably a1 ranged, as little clearance as possible being provided between flange 7 and closing disc 8. The latter is provided on its outer surface, i. e. on its left hand side when looking at Fig. 1, with a ledge 21 (Fig. 2). The hollow space 9 formed by the gate body 4. comprising the extension 6 and the closing disc 8 is on one side connected to the interior of the valve casing l, which is filled Serial No. 678,298.

with the medium under pressure, through a small opening 10, and on the other hand said hollow space 9 is connected by means of a channel 11 extending through the pin 2 with the discharge or relief pipe 12. it shut off device 13 inserted in the pipe 12 serves to connect the latter with a pipe let leading to the space behind the gate body. As indicated in dotted lines the pipe 12 may be connected by means of the shut-off device 13 also to a conduit 15 leading to the outside. 16 denotes the known by-pass conduit having a shut-elf member 17, by means of which by-pass the space at the rear of the valve may e filled in the known manner and least partly exposed to pressure before the gate body is moved into the open position.

The pressure present inside the rotary valve casing acts upon the ledge 21 of the closing disc 8 and is opposed to the pressure present in the hollow space 9. When the shut-off device 13 is opened, the pressure in the space 9 decreases and the pressure acting on the ledge 21 causes the closing disc 8 to be lifted off the valve seat. In consequence thereof the gate body 4- can easily be rotated as the disc 8 does not cause any friction during this turning motion.

I claim:

1. A rotary valve for pipe lines, compris ing in combination a valve casing provided with a seat, a gate body movable within said casing, a closing member provided with a seat adapted to cooperate with the seat of the casing, said member being movable relatively to and with the gate body and confining together with the latter a hollow space adapted to take up fluid in order to press said member against the seat of the casing, said member being so designed that the pressure present inside the valve casing acts on the member in opposition to the pressure present in said hollow space, and means for relieving said space from pressure whilst said member is still in closing position.

2. A rotary valve for pipe lines, comprising in combination a valve casing provided with a seat, a gate body movable within said casing, a closing member provided with a seat adapted to cooperate with the seat of the casing, said member being movable rela tively to and with the gate body and con fining together with the latter a hollow space adapted to take up liiiio in order to press said member in the closing; position against the seat of the c sing, at ledge provided or. the outer surface of said member and exposed to pressure present inside the valve casing; and means for relieving said space trom pressure \vhilst sziid 'meiiiber till in closing position.

21. rotary valve for pipe lines comprisin combination, a valve casing provior-d ii HES- 1 u gate body movable Within easing 51 closing iuiember uovided with iuhipted to cooperate with the Fzeut oi the casing said HlOHllJQZ. being movable relatively to and with the gate body and confining together with the latter hollow space :uliipteil to be supp l with th'rottled fluid in order to press srriu member in the closing" position against the seat of the cusingr a ledge provided on the outer surface oi said member and exposet to the pressure present inside the valve casing; and a relatively large disoha pipe tor relieving said space from pressure whilst said member is still in the closing position,

4-. A rotary valve vtor pipe lines, compris iiig in combination a valve casing provided with a seat, a gate body movable within said casing, journals one of which being hollow ou the body hzivirig their bearings in the valve casing, a closing member provided with a seat adapted to cooperate with the seat oi the easing said member being movable relatively to and With the gate body and confining together with the latter a hollow space adapted to be supplied With throttled fluid in order to press said member in the closing position against the seat of the casing, 2i ledge provided on the outer surface oi said member and exposed to the pressure present inside the ve ve casing, and it relatively large discharge pipe connected to the hollow journal for relieving said space from pressure Whilst said member is still in the closing position to cause the journals on the gate body to take up the whole pressure on said body. I

In testimony whereof I afiix my signature.

ANTON o oe. 

